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The functions of some proteins change depending on whether they are in the light or in the dark they are photoreceptive (PR) proteins. A team of scientists recently determined that PR proteins bind to DNA to regulate gene expression in microbes. Answer the following three questions about this scenario.
-A single PR protein is composed of four identical polypeptide chains that act together to bind DNA. What is the highest level of protein structure that the PR proteins have?
Federal Income Tax
A tax levied by the federal government on an individual's or corporation's annual income.
Withholding Allowance
A provision allowing employees to reduce the amount of income tax withheld from their paycheck, based on their personal allowances and deductions.
Gross Earnings
Total income earned by an individual or entity before any deductions or taxes.
Withholding Allowance
A claim made by employees on their W-4 form indicating their tax situation to employers, affecting the amount of federal income tax withheld from their paychecks.
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